Function Description
R&S
®
TS-PSAM
20
User Manual 1142.9878.12 ─ 12
DC current measurement
The measurement unit for current is capable of taking readings in a range from a few
hundred nanoamperes to a 1 A. It can be switched to the 8-wire analog bus without
limitation through a full matrix. Currents larger than 100 mA are measured using a
shunt resistor. On the other hand, currents smaller than 100 mA are measured actively
using a current-voltage converter (I/U converter).
AC current measurement
The AC current is converted to an AC voltage using a shunt or I/U converter; the AC
voltage is converted to a DC voltage with an RMS-to-DC converter, and the DC voltage
is processed by the A/D converter.
As an alternative to the RMS-to-DC converter, you can measure the curve form in DC
mode with following analysis to find the actual quantity value. The
rspsam_ConfigureRmsMethod
and
rspsam_ConfigureRmsEval
functions are
available.
Operation
Together with the driver functions, the DMM GTSL library is available for operating the
measurement unit.
5.1.3
DC stimulus source (DCS)
(DCS = DC Source)
The DCS is a potentialless, programmable DC voltage source with adjustable current
limiting and sense wires for compensating voltage drops in circuits to the load.
Depending on the test requirements, it can function either in voltage mode or in current
limiting mode. Also a pulse mode is possible.
DC stimulus source specification
Table 5-1: Voltage mode
Voltage range:
0 ... ±5 V
Current:
0 ... ±100 mA max.
Table 5-2: Current limiting mode
Voltage range:
±0,1 V ... ±5 V max.
Current limit ranges:
±100 mA, 10 mA, 1 mA, 0,1 mA
Operation
You can operate the DSC component by using the following functions:
rspsam_dcs_ConfigureOutputEnabled
rspsam_dcs_ConfigureVoltageLevel
rspsam_dcs_ConfigureCurrentLimitRange
Function description of the R&S TS-PSAM Module
